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外加剂对疏浚底泥免烧裹壳骨料性能的影响

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彭瑜洲, 杨鹏乾, 田涛, 范子纯, 吴燕. 外加剂对疏浚底泥免烧裹壳骨料性能的影响[J]. 环境工程学报, 2018, 12(3): 966-974. doi: 10.12030/j.cjee.201709132
引用本文: 彭瑜洲, 杨鹏乾, 田涛, 范子纯, 吴燕. 外加剂对疏浚底泥免烧裹壳骨料性能的影响[J]. 环境工程学报, 2018, 12(3): 966-974. doi: 10.12030/j.cjee.201709132
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PENG Yuzhou, YANG Pengqian, TIAN Tao, FAN Zichun, WU Yan. Influences of admixtures on performances of non-sintered wrap shell aggregates[J]. Chinese Journal of Environmental Engineering, 2018, 12(3): 966-974. doi: 10.12030/j.cjee.201709132
Citation: PENG Yuzhou, YANG Pengqian, TIAN Tao, FAN Zichun, WU Yan. Influences of admixtures on performances of non-sintered wrap shell aggregates[J]. Chinese Journal of Environmental Engineering, 2018, 12(3): 966-974. doi: 10.12030/j.cjee.201709132
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外加剂对疏浚底泥免烧裹壳骨料性能的影响

  • 1.

    天津科技大学化工与材料学院，天津 300457

  • 基金项目:

    中交天津港航勘察设计研究院有限公司基金资助项目(1500030023)

    中交天航环保工程有限公司基金资助项目（1700030003，1700030031）

Influences of admixtures on performances of non-sintered wrap shell aggregates

  • 1.

    College of Chemical Engineering and Materials Science, Tianjin University of Science & Technology, Tianjin 300457, China

  • Fund Project:

  • 摘要: 以太湖疏浚底泥为研究对象，采用含水率为40%的底泥湿法制备免烧骨料，将不同外加剂与胶凝材料混合制成壳粉，对骨料进行裹壳处理得到普通骨料（OSAs）、防水骨料（WSAs）和高强骨料（HSAs）。依据GB/T 17431.1-2010对各裹壳骨料的粒径分布、堆积密度、吸水性、单颗强度、筒压强度和抗冻融性等性能进行测试。在粒径分布、堆积密度方面各骨料基本一致，WSAs在吸水性上具有一定优势，最低可达8.83%。在强度方面，WSAs的单颗强度增幅可达342.6%，最大强度出现在HSAs中，为2.18 MPa。HSAs具有坚硬、密实的壳层结构，表现出较好的机械性能，20次抗冻融循环的质量损失率最低仅为15.22%。研究表明：增强壳层结构是提升免烧裹壳骨料性能的关键，利用外加剂能达到理想的效果。
    Abstract: Taihu Lake dredged sediment with 40% water content was selected as raw material to prepare non-sintered aggregates by wet process. The above non-sintered aggregates become OSAs, WSAs, HSAs by wrap-shell treatment with shell powder containing cementitious materials and different admixtures. The performances of non-sintered aggregates, such as size distribution, packing density, water absorption, single strength, cylinder compressive strength, freezing-thawing resistance, which were investigated in accordance with relevant GB/T 17431.1-2010. The size distribution and packing density of all kinds of aggregates are identical. WSAs has comparative advantages in the water absorption, the minimum is 8.83%. In terms of strength, the amplification of single strength of WSAs can reach 342.6%, but the intensity of the largest is 2.18 MPa in HSAs. There are good mechanical properties in HSAs with hard and dense shell structure, and the lowest mass loss rate by 20 freezing-thawing cycles is only 15.22%. Research shows that the key of improving the performances of non-sintered aggregates is reinforcing shell structure, using admixtures can achieve the ideal effect.
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  • 刊出日期:  2018-03-22

外加剂对疏浚底泥免烧裹壳骨料性能的影响

  • 1. 天津科技大学化工与材料学院，天津 300457
基金项目:

中交天津港航勘察设计研究院有限公司基金资助项目(1500030023)

中交天航环保工程有限公司基金资助项目（1700030003，1700030031）

摘要: 以太湖疏浚底泥为研究对象，采用含水率为40%的底泥湿法制备免烧骨料，将不同外加剂与胶凝材料混合制成壳粉，对骨料进行裹壳处理得到普通骨料（OSAs）、防水骨料（WSAs）和高强骨料（HSAs）。依据GB/T 17431.1-2010对各裹壳骨料的粒径分布、堆积密度、吸水性、单颗强度、筒压强度和抗冻融性等性能进行测试。在粒径分布、堆积密度方面各骨料基本一致，WSAs在吸水性上具有一定优势，最低可达8.83%。在强度方面，WSAs的单颗强度增幅可达342.6%，最大强度出现在HSAs中，为2.18 MPa。HSAs具有坚硬、密实的壳层结构，表现出较好的机械性能，20次抗冻融循环的质量损失率最低仅为15.22%。研究表明：增强壳层结构是提升免烧裹壳骨料性能的关键，利用外加剂能达到理想的效果。

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